Cavity filter

The utility model belongs to the technical field of filters, and provides a cavity filter comprising a cavity; the bosses are arranged at the bottom of the cavity in a staggered manner; an axial through hole is formed in each resonant column, and the bottom surface of each resonant column is welded on the corresponding boss in a pressure welding manner; the resonant column comprises a column body section and a disc section, and the disc section is arranged at the upper end of the column body section; and the cover plate is arranged on the cavity. According to the technical scheme provided by the embodiment of the utility model, the upper surface of the cavity comprises the plurality of bosses, the bosses are arranged in a staggered manner, and the resonant columns are fixed on the bosses in a pressure welding manner, so that the consistency in the assembly process is high, the problem of difficult assembly in the production process is avoided, and the assembly efficiency is effectively improved. 本实用新型属于滤波器技术领